SNS : Split-brain mode on high-availability cluster (CVE-2021-3398)
| Advisory ID | CVE Number | Date discovered | Severity | Advisory revision |
|---|---|---|---|---|
| STORM-2021-001 | CVE-2021-3398 | 11/24/2020 | medium | v1 |
Vulnerability details
A DoS attack on a SNS cluster can break the synchronisation between the master and the slave, leading to a split-brain mode, where both appliances are on “active” state.
Impacted products
| Products | Severity | Detail |
|---|---|---|
| Stormshield Network Security | medium | SNS is impacted |
Revisions
| Version | Date | Description |
|---|---|---|
| v1 | 02/09/2022 | Initial release |
Stormshield Network Security |
CVSS v3.1 Overall Score: 6.4
|
Analysis |
Impacted version |
|
By triggering this vulnerability, the SNS cluster is set on split-brain mode, where both master and slave are Active. |
|
Workaround solution |
Solution |
|
There is no workaround solution. |
The 3.7.25 and 3.11.13 updates fix this vulnerability. |
| Attack Vector | Attack Complexity | Privileges Required | User Interaction | Scope | Confidentiality Impact | Integrity Impact | Availability impact |
|---|---|---|---|---|---|---|---|
| Network | Low | None | None | Changed | None | None | Low |
| CVSS Base score: 5.8 | CVSS Vector: (AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L) |
| Exploit Code Maturity | Remediation Level | Report Confidence |
|---|---|---|
| High | Official fix | Confirmed |
| CVSS Temporal score: 5.6 | CVSS Vector: (AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L/E:H/RL:O/RC:C) |
| Confidentiality Requirement | Integrity Requirement | Availability Requirement |
|---|---|---|
| High | High | High |
| CVSS Environmental score: 6.4 | CVSS Vector: (AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L/E:H/RL:O/RC:C/CR:H/IR:H/AR:H/MAV:X/MAC:X/MPR:X/MUI:X/MS:X/MC:X/MI:X/MA:X) |